Impact Testing

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Jan Luyten - One of the best experts on this subject based on the ideXlab platform.

  • charpy Impact Testing of metallic selective laser melting parts
    Virtual and Physical Prototyping, 2010
    Co-Authors: Evren Yasa, Jan Patrick Deckers, Jean‐pierre Kruth, Marleenl Rombouts, Jan Luyten
    Abstract:

    Selective laser melting (SLM) is a layer-additive manufacturing technology which makes it possible to create fully functional parts directly from standard metals without any intermediate binders or any additional post-processing steps. During SLM, a high-intensity laser beam selectively scans a powder bed according to the CAD data of the part to be produced and powder particles are completely melted. SLM is capable of producing near full density parts with an almost infinite geometric freedom. However, the mechanical properties obtained with SLM may differ from the ones of bulk material. In this study, Charpy Impact tests are applied on the samples produced by SLM from different materials; Ti-6A1-4V, AISI 316L (X2CrNiMo18-14-3) and maraging steel 300 (X3CoMoTi18-9-5). The influence of the building axis as well as of various heat treatments applied on the samples after SLM is investigated. The evolution of the microstructures of the sample parts is also studied.

  • Charpy Impact Testing of metallic selective laser melting parts
    Virtual and Physical Prototyping, 2010
    Co-Authors: Evren Yasa, Jan Patrick Deckers, Jean‐pierre Kruth, Marleenl Rombouts, Jan Luyten
    Abstract:

    Selective laser melting (SLM) is a layer-additive manufacturing technology which makes it possible to create fully functional parts directly from standard metals without any intermediate binders or any additional post-processing steps. During SLM, a high- intensity laser beam selectively scans a powder bed according to the CAD data of the part to be produced and powder particles are completely melted. SLM is capable of producing near full density parts with an almost infinite geometric freedom. However, the mechanical properties obtained with SLM may differ from the ones of bulk material. In this study, Charpy Impact tests are applied on the samples produced by SLM from different materials; Ti-6Al-4V, AISI 316L (X2CrNiMo18-14-3) and maraging steel 300 (X3CoMoTi18-9-5). The influence of the building axis as well as of various heat treatments applied on the samples after SLM is investigated. The evolution of the microstructures of the sample parts is also studied. Keywords:

Evren Yasa - One of the best experts on this subject based on the ideXlab platform.

  • charpy Impact Testing of metallic selective laser melting parts
    Virtual and Physical Prototyping, 2010
    Co-Authors: Evren Yasa, Jan Patrick Deckers, Jean‐pierre Kruth, Marleenl Rombouts, Jan Luyten
    Abstract:

    Selective laser melting (SLM) is a layer-additive manufacturing technology which makes it possible to create fully functional parts directly from standard metals without any intermediate binders or any additional post-processing steps. During SLM, a high-intensity laser beam selectively scans a powder bed according to the CAD data of the part to be produced and powder particles are completely melted. SLM is capable of producing near full density parts with an almost infinite geometric freedom. However, the mechanical properties obtained with SLM may differ from the ones of bulk material. In this study, Charpy Impact tests are applied on the samples produced by SLM from different materials; Ti-6A1-4V, AISI 316L (X2CrNiMo18-14-3) and maraging steel 300 (X3CoMoTi18-9-5). The influence of the building axis as well as of various heat treatments applied on the samples after SLM is investigated. The evolution of the microstructures of the sample parts is also studied.

  • Charpy Impact Testing of metallic selective laser melting parts
    Virtual and Physical Prototyping, 2010
    Co-Authors: Evren Yasa, Jan Patrick Deckers, Jean‐pierre Kruth, Marleenl Rombouts, Jan Luyten
    Abstract:

    Selective laser melting (SLM) is a layer-additive manufacturing technology which makes it possible to create fully functional parts directly from standard metals without any intermediate binders or any additional post-processing steps. During SLM, a high- intensity laser beam selectively scans a powder bed according to the CAD data of the part to be produced and powder particles are completely melted. SLM is capable of producing near full density parts with an almost infinite geometric freedom. However, the mechanical properties obtained with SLM may differ from the ones of bulk material. In this study, Charpy Impact tests are applied on the samples produced by SLM from different materials; Ti-6Al-4V, AISI 316L (X2CrNiMo18-14-3) and maraging steel 300 (X3CoMoTi18-9-5). The influence of the building axis as well as of various heat treatments applied on the samples after SLM is investigated. The evolution of the microstructures of the sample parts is also studied. Keywords:

George J. Cisneros - One of the best experts on this subject based on the ideXlab platform.

  • questionnaire development face validity and item Impact Testing of the child oral health Impact profile
    Community Dentistry and Oral Epidemiology, 2007
    Co-Authors: Hillary L. Broder, Colman Mcgrath, George J. Cisneros
    Abstract:

    Objective:  The Child Oral Health Impact Profile (COHIP) was designed to assess oral-facial well-being in school-age children as reported by the child and via proxy report from a caregiver. This article describes the development of the COHIP using a multi-staged Impact approach recommended by Guyatt et al. (Quality of life and pharmacoeconomics in clinical trials. Philadelphia, PA: Lippincott-Raven; 1996. p. 41). Methods:  There were multiple phases to the development of the questionnaire: (i) initial pool of items developed from the literature and expert review; (ii) face validity of items; (iii) Impact evaluation of the initial item pool; (iv) development of positive items and face validity of new items; (v) Impact evaluation of the revised questionnaire and (vi) factor analysis and final revision of the questionnaire. Factor analysis was completed on the final questionnaire using data from the Impact evaluation in order to evaluate whether the COHIP measured independent conceptual domains. Results:  Factor analysis identified five domains: oral health, functional well-being, social/emotional well-being, school environment and self-image. Readability was calculated using the Flesch-Kinkaid readability score that was finalized at a 3.5 grade reading level. Finally, two response sets, and a revised format (e.g., including pictures, increasing font size, and shading every other item) were implemented to decrease respondent fatigue and increase accuracy of participant responses. Conclusions:  The final questionnaire consisted of 34 items and five conceptually distinct subscales: oral health, functional well-being, social/emotional well-being, school environment and self-image. Subsequent papers present the validity and reliability of the COHIP.

  • Questionnaire development: Face validity and item Impact Testing of the child oral health Impact profile
    Community Dentistry and Oral Epidemiology, 2007
    Co-Authors: Hillary L. Broder, Colman Mcgrath, George J. Cisneros
    Abstract:

    OBJECTIVE: The Child Oral Health Impact Profile (COHIP) was designed to assess oral-facial well-being in school-age children as reported by the child and via proxy report from a caregiver. This article describes the development of the COHIP using a multi-staged Impact approach recommended by Guyatt et al. (Quality of life and pharmacoeconomics in clinical trials. Philadelphia, PA: Lippincott-Raven; 1996. p. 41). METHODS: There were multiple phases to the development of the questionnaire: (i) initial pool of items developed from the literature and expert review; (ii) face validity of items; (iii) Impact evaluation of the initial item pool; (iv) development of positive items and face validity of new items; (v) Impact evaluation of the revised questionnaire and (vi) factor analysis and final revision of the questionnaire. Factor analysis was completed on the final questionnaire using data from the Impact evaluation in order to evaluate whether the COHIP measured independent conceptual domains. RESULTS: Factor analysis identified five domains: oral health, functional well-being, social/emotional well-being, school environment and self-image. Readability was calculated using the Flesch-Kinkaid readability score that was finalized at a 3.5 grade reading level. Finally, two response sets, and a revised format (e.g., including pictures, increasing font size, and shading every other item) were implemented to decrease respondent fatigue and increase accuracy of participant responses. CONCLUSIONS: The final questionnaire consisted of 34 items and five conceptually distinct subscales: oral health, functional well-being, social/emotional well-being, school environment and self-image. Subsequent papers present the validity and reliability of the COHIP.

Marleenl Rombouts - One of the best experts on this subject based on the ideXlab platform.

  • charpy Impact Testing of metallic selective laser melting parts
    Virtual and Physical Prototyping, 2010
    Co-Authors: Evren Yasa, Jan Patrick Deckers, Jean‐pierre Kruth, Marleenl Rombouts, Jan Luyten
    Abstract:

    Selective laser melting (SLM) is a layer-additive manufacturing technology which makes it possible to create fully functional parts directly from standard metals without any intermediate binders or any additional post-processing steps. During SLM, a high-intensity laser beam selectively scans a powder bed according to the CAD data of the part to be produced and powder particles are completely melted. SLM is capable of producing near full density parts with an almost infinite geometric freedom. However, the mechanical properties obtained with SLM may differ from the ones of bulk material. In this study, Charpy Impact tests are applied on the samples produced by SLM from different materials; Ti-6A1-4V, AISI 316L (X2CrNiMo18-14-3) and maraging steel 300 (X3CoMoTi18-9-5). The influence of the building axis as well as of various heat treatments applied on the samples after SLM is investigated. The evolution of the microstructures of the sample parts is also studied.

  • Charpy Impact Testing of metallic selective laser melting parts
    Virtual and Physical Prototyping, 2010
    Co-Authors: Evren Yasa, Jan Patrick Deckers, Jean‐pierre Kruth, Marleenl Rombouts, Jan Luyten
    Abstract:

    Selective laser melting (SLM) is a layer-additive manufacturing technology which makes it possible to create fully functional parts directly from standard metals without any intermediate binders or any additional post-processing steps. During SLM, a high- intensity laser beam selectively scans a powder bed according to the CAD data of the part to be produced and powder particles are completely melted. SLM is capable of producing near full density parts with an almost infinite geometric freedom. However, the mechanical properties obtained with SLM may differ from the ones of bulk material. In this study, Charpy Impact tests are applied on the samples produced by SLM from different materials; Ti-6Al-4V, AISI 316L (X2CrNiMo18-14-3) and maraging steel 300 (X3CoMoTi18-9-5). The influence of the building axis as well as of various heat treatments applied on the samples after SLM is investigated. The evolution of the microstructures of the sample parts is also studied. Keywords:

Jean‐pierre Kruth - One of the best experts on this subject based on the ideXlab platform.

  • charpy Impact Testing of metallic selective laser melting parts
    Virtual and Physical Prototyping, 2010
    Co-Authors: Evren Yasa, Jan Patrick Deckers, Jean‐pierre Kruth, Marleenl Rombouts, Jan Luyten
    Abstract:

    Selective laser melting (SLM) is a layer-additive manufacturing technology which makes it possible to create fully functional parts directly from standard metals without any intermediate binders or any additional post-processing steps. During SLM, a high-intensity laser beam selectively scans a powder bed according to the CAD data of the part to be produced and powder particles are completely melted. SLM is capable of producing near full density parts with an almost infinite geometric freedom. However, the mechanical properties obtained with SLM may differ from the ones of bulk material. In this study, Charpy Impact tests are applied on the samples produced by SLM from different materials; Ti-6A1-4V, AISI 316L (X2CrNiMo18-14-3) and maraging steel 300 (X3CoMoTi18-9-5). The influence of the building axis as well as of various heat treatments applied on the samples after SLM is investigated. The evolution of the microstructures of the sample parts is also studied.

  • Charpy Impact Testing of metallic selective laser melting parts
    Virtual and Physical Prototyping, 2010
    Co-Authors: Evren Yasa, Jan Patrick Deckers, Jean‐pierre Kruth, Marleenl Rombouts, Jan Luyten
    Abstract:

    Selective laser melting (SLM) is a layer-additive manufacturing technology which makes it possible to create fully functional parts directly from standard metals without any intermediate binders or any additional post-processing steps. During SLM, a high- intensity laser beam selectively scans a powder bed according to the CAD data of the part to be produced and powder particles are completely melted. SLM is capable of producing near full density parts with an almost infinite geometric freedom. However, the mechanical properties obtained with SLM may differ from the ones of bulk material. In this study, Charpy Impact tests are applied on the samples produced by SLM from different materials; Ti-6Al-4V, AISI 316L (X2CrNiMo18-14-3) and maraging steel 300 (X3CoMoTi18-9-5). The influence of the building axis as well as of various heat treatments applied on the samples after SLM is investigated. The evolution of the microstructures of the sample parts is also studied. Keywords: